Wind
Tunnel Aerodynamics Activity If so instructed by your teacher, print out a worksheet
page for these problems.

Open the slides called
Bernoulli's Equation (with
text) and Wind Tunnel Aerodynamics(with text) and read the explanations of the relationships between air
velocity, pressure, and density in a closed system of varying cross section
like a wind tunnel.

Shown below is an
image of a typical wind tunnel with three cross sections: A (test section),
B (Fan Outlet) and C .

The wind tunnel test
section (A), as in some operating wind tunnels, can be resized by moving
the walls, ceiling and/or floor to give a different cross-sectional area.
The other two sections B and C are not adjustable. Give all answers to the
nearest hundredth.

The measured velocity
in the rectangular test section (A) is 10 m/sec. The initial dimensions
of the test section are 3 m high and 4 m wide.

What
is the cross-sectional area (A)? ________________

What is the
constant (V x A)? ________________

What cross-sectional
area (A) will I need to double the velocity? ________________

What cross-sectional
area ( A) will I need to decrease the velocity fourfold? ________________

What would
the velocity be if I changed the dimensions to 6 m high and 4
m wide?_____________________________

What would
the velocity be if I changed the dimensions to 5 m high and 5
m wide? _____________________________